Clapboard-sawing machine.



M. L. STEARNS.

CLAPBOARD SAWING MACHINE.

APPLICATION FILED 1uLY31. 1914.

'Patented May 23,1916.

Nl. L. STEA-RNS.

CLAPBOARD SAWING MACHINE.

APPLICATION FILED JULY 3l. 1914.

Patented May 23, 1916.

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' carry NTED STATES FATEINT GFFCE.

MILO LEONARD STEARNOF LORIGNAL, ONTARIO, CANADA, ASSIG'NOR TO ELIZABETH MARION STEARNS, OF LORIGNAL, ONTARIO, CANADA.

oLAPBoAnn-snwrne MACHINE.

Original application filed January 2, 1914, Serial No. 809,891.

Specication of Letters Patent.

Patented May 23, 1916.

Divided and this application iiled July 31,

1914. Serial No. 854,300.

To all whom t may concern:

Be it known that I, MILo LEONARD S'rnABNs, a subject of the King of Great Britain, and resident of LOrignal, Province of Ontario, Dominion of Canada, have invented certain new and useful Improvements in Clapboard-Sawing Machines, of which the following is the specification.

This invention relates to improvements in clap-board sawing machines, andthe objects of the invention are to eliminate the jarring effect usual to the log supporting members as the saw is engagedin cutting the log, to simplify the construction, and other objects which will be made clear hereafter, and it consists essentially of the improved construction of machine particularly described and set forth in the following specicatio-n and accompanying drawings forming part of the same.

ln the drawings, Figure 1 is a side elevation of the clapboard sawing machine showing the improved device attached thereto. Fig. 2`is a plan of the same. Fig. 8 is an end elevation. Fig. A is a detail of the supporting bracket for the log.

in the drawings like characters of reference refer to like`parts in the several drawmo's.

ihe mechanism of this machine is in general similar to that set forth in application Serial Number 809,891, from which the present application has been divided.

Referring to the drawings, A0 is the reciprocatory carriage which is adapted to the log and feed it in a longitudinal direction to the band saw S. This carriage is of suitable construction and mounted on the framework by meansof the rollers 10 which" engage tracks 11 on the framework, the carriage being reciprocated by any suitable means; The band saw S is double edged and preferably operates vertically. rlhe supporting means for the log are adapted to engage the ends thereof near the peripher)T and turn the log about its vertical axis. r1`his is accomplished by means of a pair of'crank members C and D, each of which is axially movable and has a portion 13 journaled in suitable bearings 14 on the carriage. The opposite arm 15 of each crank member' has its end adapted to be connected to a log near the periphery by means of the chuck members 16 which are driven through with the chuck members 16, and to this end the lever A is pivotally attached to the quadrant A2, the motion being transmitted through the rods A3 and A4 attached to the lever A equidistant to and on opposite sides of the lever fulcrum. The opposite ends of the rods A3 and A4 are pivotally attached to the crank members A5 and A6 mounted intermediate of the shafts A7 and A8, the ends of which shafts remote from the cranks A5 and A6 carry the striking levers A9 and A10 which are designed to fit the collars A11 vand A12 attached to the end 13 0f the crank members C and D.

The logs are adapted to be turned a distance at each reciprocation of the carriage m order that a new cut may be taken, the mechanism by which this is accomplished being in all respects the same as that set forth in application Serial Number 809,891. It will be quite clear that the motion of the log will be somewhat of an eccentric nature owing to the manner of supporting the same from a point near its periphery and due to the arms 15 being offset from the crank members C and D. At the instant when the saw S engages withV the log and during the sawing of the same the lever G supports the log, this being accomplished by means of the shaft G provided with a fixed lever G2 carrying the balance weight G3. The shaft G is supported by suitable bearings G4 and G5. The brackets GG are fixed to the shaft G and carry the pawls G7. The lever G is pivotally attached' intermediate of its ends to the machine by means of the shaft G9, the end far remote from this shaft having a downwardly extending curved rack G8 rigidly fixed thereto. The lever G is supported intermediate of its length by the arm G10 rigidly attached to the outer end of the lever G1? operated by the shaft G9. When the saw is about to engage the log, the weight G3 isdisengaged from the inclined plate G13 causing the shaft G to be rotated through a short distance, the movement of the shaft being governed by the lever G14 which in turn is connected to the strap G15. As the rotation of the log takes place it will or scope thereof, it is intended that all matc ter contained in the accompanying specification anddrawings shall be interpreted as be quite clear that the lever G is depressed at the front side, the back end being ele vated and the pavvls G7 due to the move- Y ment of the shaft G engage With the teethof the curved rack G8. As the saw S reaches the end of the log the Weight G3V engages ,With the corresponding inclined plate G13 and releases the paWl GlotherebyV allowing the lever Gto take up its originalV position. The shock or jar on the arms G10 is counterbalzanced by the action 'of rthe*v Vspiral springs G1G operating on the lever illustrative and not in a limiting sense. VVhat-I claim as my invention is: Vl. A mechanism forthe purpose Yspeci-k fied comprising a reciprocatoryv carriage,

axially movable crank members thereon having their ends adaptedV to engage the endsV of the log near the periphery thereof, levers pivotally mounted intermediate of their ends, adapted to'engage vvith said log, a downwardly disposed curved rack rigidly mounted on the said levers, paWls adapted to, engagevvith the said rack and means for actuating thefsaid paivls, as and for the purpose specied.

j 2. A mechanism forthe purpose specied comprising a reciprocatory carriage, axially` movable crank members thereon'` having their'ends adapted to engage theendsof theV Y"(.ap'iea ofvthis patent mayebe obtainedY` for `tive cents each, ,by addressing teheiciopm l Y f Washingtamn? log` near therperipheryY thereof leverspivotally mounted intermediate of their'ends Yadapted to support the said log, -doWn- Wardly disposed curved racks mountedon thesaid levers, a shaft, brackets mounted on the saidv shaft, paWls mounted on the said brackets, a counterbalance Weight designed to be attached to the said shaft, and tapered plates designed to, engage With the said counterbalance Weight, as and for the pur-j pose specified. c

I 3.` A mechanism for the purpose'specified It Will be clear that'the function ofthe comprising a.V reciprocatory carriage, axially movable crank 'members thereon having their ends adapted Vto engagevvith the ends of the log near` the periphery thereof, a

shaft, levers pivotally mounted intermediateV i p vof their'ends'to the 'said'shafa such'levers being designed to engage-at *one end With the said log, 'downwardlydis'posed curved i y Vfor eliminating*theshockl of sawing from the last saifd leversandarms, as and'l forV the V purpose specified.V

4, A mechanism for the purposespecifiedV comprising' a reciprocatory carriage,y axially movable crank members thereonyadapted to c engage thev ends of a log near the periphery ing operation, a VgravityA controlled lshaft thereof, levers pivotally mounted interme-YY diate of their ends for supporting the log to Yrelieve the crank members during the savvl and va co-acting laction between said shaft and said levers'y Whereby'said shaft controls Y the action of the said levers'.

5,. A mechanism for the purpose specified .comprising aireciprocatory carriage, axiallyl movable crank members thereon adapted vto engage the ends of aY log near the periphery thereof, leverspivotally mounted intermediate of their ends for supporting the log to relieve the crank membersrrduring the' sawing operation, argravity controlled shaft Y and a co-acting'aotion Ybetween said shaft and said levers whereby said shaft controls the action'of the s aid'levers,fsaidv'connecT tion including cam means.'

Y 6. A mechanism for the purposespeciiied u comprising a' reciprocatory carriage, axially 'movable crank membersthereon adapted to Y g Y engage the ends of afljog 119er the periphery thereof, VleversY pivotally mounted intermediate of their ends for supporting the log r to relieve the crank members rduring the sawingV operatiomand automatic means for limiting levers. 1

the pivotalmotion of thesaid In witnesslivhereof IV have hereunto setVY my hand in the presence of tvvo 'Witnessesrp MILO.LEONARD:'STEARNSY.`

n liVitnesses;

' YRussian S. SMART, y 'y f DARRfoW. t

so'i 

